电池状态

引用:http://blog.csdn.net/ouyangtianhan/article/details/7197987

想使用Android系统的电池侦听和系统的电池图片；

引入源代码中的两个xml文件（这里我在Android2.2的jar包中找不到，所以才引入，源代码路径：C:\android-sdk-windows\platforms\android-8\data\res\drawable），之后会发现stat_sys_battery.xml报错，所以我就将下图

1.这些图引入到我的drawable目录下，然后将stat_sys_battery.xml中的图片引入路径更改，如下：

<level-list xmlns:Android="http://schemas.android.com/apk/res/android">
    <item android:maxLevel="4" android:drawable="@drawable/stat_sys_battery_0" />
    <item android:maxLevel="14" android:drawable="@drawable/stat_sys_battery_10" />
    <item android:maxLevel="29" android:drawable="@drawable/stat_sys_battery_20" />
    <item android:maxLevel="49" android:drawable="@drawable/stat_sys_battery_40" />
    <item android:maxLevel="69" android:drawable="@drawable/stat_sys_battery_60" />
    <item android:maxLevel="89" android:drawable="@drawable/stat_sys_battery_80" />
    <item android:maxLevel="100" android:drawable="@drawable/stat_sys_battery_100" />
</level-list>

2.接下来是在activity中的操作：

   创建一个IntentFilter

<span style="white-space:pre">    </span>private IntentFilter mIntentFilter;

    在oncreate的方法中：加入：

<span style="white-space:pre">    </span>//电池相关
<span style="white-space:pre">    </span>mIntentFilter = new IntentFilter();
<span style="white-space:pre">    </span>mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);

3.接收广播

<span style="white-space:pre">    </span>//声明消息处理过程
       private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
           @Override
           public void onReceive(Context context, Intent intent) {
               String action = intent.getAction();
               int status = intent.getIntExtra("status", 0);
               int health = intent.getIntExtra("health", 0);
               boolean present = intent.getBooleanExtra("present", false);
               int level = intent.getIntExtra("level", 0);
               int scale = intent.getIntExtra("scale", 0);
               int icon_small = intent.getIntExtra("icon-small", 0);
               int plugged = intent.getIntExtra("plugged", 0);
               int voltage = intent.getIntExtra("voltage", 0);
               int temperature = intent.getIntExtra("temperature", 0);
               String technology = intent.getStringExtra("technology");
               String statusString = "";
               switch (status) {
               case BatteryManager.BATTERY_STATUS_UNKNOWN:
                   statusString = "unknown";
                   break;
               case BatteryManager.BATTERY_STATUS_CHARGING:
                   statusString = "charging";
                   battery_image.setImageResource(R.drawable.stat_sys_battery_charge);
                   battery_image.getDrawable().setLevel(level);
                   break;
               case BatteryManager.BATTERY_STATUS_DISCHARGING:
                   statusString = "discharging";
                   battery_image.setImageResource(R.drawable.stat_sys_battery);
                   battery_image.getDrawable().setLevel(level);
                   break;
               case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
                   statusString = "not charging";
                   break;
               case BatteryManager.BATTERY_STATUS_FULL:
                   statusString = "full";
                   break;
               }
               String healthString = "";
               switch (health) {
               case BatteryManager.BATTERY_HEALTH_UNKNOWN:
                   healthString = "unknown";
                   break;
               case BatteryManager.BATTERY_HEALTH_GOOD:
                   healthString = "good";
                   break;
               case BatteryManager.BATTERY_HEALTH_OVERHEAT:
                   healthString = "overheat";
                   break;
               case BatteryManager.BATTERY_HEALTH_DEAD:
                   healthString = "dead";
                   break;
               case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
                   healthString = "voltage";
                   break;
               case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:
                   healthString = "unspecified failure";
                   break;
               }
               String acString = "";
               switch (plugged) {
               case BatteryManager.BATTERY_PLUGGED_AC:
                   acString = "plugged ac";
                   break;
               case BatteryManager.BATTERY_PLUGGED_USB:
                   acString = "plugged usb";
                   break;
               }
               Log.i("cat", statusString);
               Log.i("cat", healthString);
               Log.i("cat", String.valueOf(present));
               Log.i("cat", String.valueOf(level));
               Log.i("cat", String.valueOf(scale));
               Log.i("cat", String.valueOf(icon_small));
               Log.i("cat", acString);
               Log.i("cat", String.valueOf(voltage));
               Log.i("cat", String.valueOf(temperature));
               Log.i("cat", technology);
               //要看看是不是我们要处理的消息
               if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
                   //电池电量，数字
                   Log.d("Battery", "" + intent.getIntExtra("level", 0));
                   //电池最大容量
                   Log.d("Battery", "" + intent.getIntExtra("scale", 0));
                   //电池伏数
                   Log.d("Battery", "" + intent.getIntExtra("voltage", 0));
                   //电池温度
                   Log.d("Battery", "" + intent.getIntExtra("temperature", 0));
                   //电池状态，返回是一个数字
                   // BatteryManager.BATTERY_STATUS_CHARGING 表示是充电状态
                   // BatteryManager.BATTERY_STATUS_DISCHARGING 放电中
                   // BatteryManager.BATTERY_STATUS_NOT_CHARGING 未充电
                   // BatteryManager.BATTERY_STATUS_FULL 电池满
                   Log.d("Battery", "ss" + intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_CHARGING));
                   //充电类型 BatteryManager.BATTERY_PLUGGED_AC 表示是充电器，不是这个值，表示是 USB
                   Log.d("Battery", "" + intent.getIntExtra("plugged", 0));
                   //电池健康情况，返回也是一个数字
                   //BatteryManager.BATTERY_HEALTH_GOOD 良好
                   //BatteryManager.BATTERY_HEALTH_OVERHEAT 过热
                   //BatteryManager.BATTERY_HEALTH_DEAD 没电
                   //BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE 过电压
                   //BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE 未知错误
                   Log.d("Battery", "" + intent.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN));
               }
           }
       };

    这里真正处理图片变换的是以下几句话：其他的我是在做备注

<span style="font-weight: bold; white-space: pre; ">  </span>switch (status) {
               case BatteryManager.BATTERY_STATUS_UNKNOWN:
                   statusString = "unknown";
                   break;
               case BatteryManager.BATTERY_STATUS_CHARGING:
                   statusString = "charging";
                   battery_image.setImageResource(R.drawable.stat_sys_battery_charge);
                   battery_image.getDrawable().setLevel(level);
                   break;
               case BatteryManager.BATTERY_STATUS_DISCHARGING:
                   statusString = "discharging";
                   battery_image.setImageResource(R.drawable.stat_sys_battery);
                   battery_image.getDrawable().setLevel(level);
                   break;
               case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
                   statusString = "not charging";
                   break;
               case BatteryManager.BATTERY_STATUS_FULL:
                   statusString = "full";
                   break;
               }

4.在onResume方法中注册消息处理器 

<span style="white-space:pre">    </span>registerReceiver(mIntentReceiver, mIntentFilter);

5.在onPause方法中注销

<span style="white-space:pre">    </span>unregisterReceiver(mIntentReceiver);